A5068108410- Meteorological Phenomena and Simulations
- Calibration and Measurement Techniques
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Climate variability and models
- Precipitation Measurement and Analysis
- Adaptive optics and wavefront sensing
- Tropical and Extratropical Cyclones Research
- Advanced Image Fusion Techniques
- Atmospheric chemistry and aerosols
- Optical Systems and Laser Technology
- Optical Polarization and Ellipsometry
- Icing and De-icing Technologies
- Infrared Target Detection Methodologies
- Safety and Risk Management
- Soil Moisture and Remote Sensing
- Climate change and permafrost
- Remote Sensing in Agriculture
- Wind and Air Flow Studies
- Marine and Coastal Research
- Ionosphere and magnetosphere dynamics
- Evaluation Methods in Various Fields
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
China Meteorological Administration
2014-2025
State Key Laboratory of Severe Weather
2024
Chinese Academy of Meteorological Sciences
2022
Fengyun-4A (FY-4A), the first of Chinese next-generation geostationary meteorological satellites, launched in 2016, offers several advances over FY-2: more spectral bands, faster imaging, and infrared hyperspectral measurements. To support major objective developing prototypes FY-4 science algorithms, two product algorithm testbeds for imagers sounders have been developed by scientists Algorithm Working Group (AWG). Both testbeds, written FORTRAN C programming languages Linux or UNIX...
The High Spectral Infrared Atmospheric Sounder (HIRAS) is the first Chinese Fourier Transform Michelson interferometer onboard FengYun 3D (FY-3D) polar-orbiting meteorological satellite launched on November 15, 2017. FY-3D HIRAS provides infrared (IR) radiance spectra measurements in three spectral bands: long-wave IR (LWIR) band from 650 to 1135 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> , middle-wave (MWIR) 1210 1750 and...
Abstract With the successful launch of FengYun‐4A (FY‐4A), first satellite in a new Chinese geostationary weather series (FY‐4 series), which carries high spectral resolution infrared (IR) sounder called GIIRS (Geosynchronous Interferometric Infrared Sounder), and vertical atmospheric profiles can be obtained frequently at regional scale. A fast radiative transfer model is key component for quantitative applications radiance measurements, including deriving soundings near real time situation...
The High-Spectral Infrared Atmospheric Sounder (HIRAS) is a Fourier transform spectrometer onboard the fourth polar-orbiting FengYun 3D satellite (FY-3D). FY-3D HIRAS provides interferogram measurements of Earth view radiance spectra in three infrared spectral bands at 29 cross-track positions, each with 2 × array field views (FOVs). level 1 data cover from 650 to 1135 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> [long-wave (LW)...
A gale occurred in Beijing on 30 May 2024, which led to fallen trees and damaged infrastructure. This event was primarily driven by surface divergent winds induced strong convective downdrafts. During the occurrence development of this gale, solar shortwave radiation cloud-related variables played a crucial role triggering, sustaining, organizing convection. study proposes new diagnostic analysis approach for focusing involved physical processes development, based FY-4B L2 products...
HIRAS-II is the hyperspectral detector carried on FengYun-3E which world’s first meteorological satellite in dawn–dusk orbit. It fills observation gaps during dawn and dusk periods of polar orbit satellites, enabling a 100% global data coverage assimilation within each 6 h window for numerical weather forecasting models. With 3053 vertical detection channels, it provides high-resolution temperature humidity information, thus playing an important role improving forecast skills medium-range...
Fengyun (FY) satellite program is becoming the important component of global earth observing system. Its instrumental performance, i.e., data quality and stability, play a critical role to support quantitative applications, such as atmospheric surface parameter retrievals, numerical weather prediction (NWP) production Climate Data Records (CDRs). For monitoring radiative transfer models (RTMs) together with NWP fields are used simulate reference radiance in FY instrument schemes (FY-SIMS)....
Multilayer clouds have a significant importance on cloud climate effects and remote sensing retrieval. In this study, multilayer detection algorithm is developed for the Advanced Geostationary Radiation Imagers (AGRI) onboard FY-4A geostationary satellite. The based basic physical assumptions that are also employed MODIS VIIRS to identify ice overlaying water clouds. Synchronous observation of Cloud Aerosol Lidar with Orthogonal Polarization (CALIOP) has been collected acknowledged as...
InfraRed Atmospheric Sounder (IRAS) instruments were successfully launched onboard the FengYun-3A (FY3A) and FengYun-3B (FY3B) satellites on May 27, 2008, November 5, 2010, respectively. They aim at providing multichannel radiances within spectral range of visible to infrared (IR) wavelengths for many environmental applications, including data assimilation retrievals global atmospheric temperature humidity profiles. However, velocity filter wheel first IRAS FY3A is unstable and, therefore,...
Considering the characteristics of nonlinear problems, a new method based on L-curve and including concept entropy was designed to select regularization parameter in one-dimensional variational analysis-based sounding retrieval method. In first iteration, this uses an empirical derived by minimizing variables. During subsequent iterations, it vicinity selected last iteration. The employed retrieving atmospheric temperature moisture profiles from Atmospheric Infrared Sounder radiance...
Abstract Terrain and cloud height heavily impact ozone information despite being concentrated in the stratosphere. The weighting function (OWF) provides important towards understanding capabilities limitations of a given channel. factors that OWF can be analyzed using radiative transfer theory modeling. At 9.6-μm infrared spectral region, both values peaks are related to surface temperature, terrain altitude, height. Warmer temperatures, lower or levels will give larger values, peak slightly...
Based on the community radiative transfer model, ensemble tree-based random forest algorithm, and extreme gradient boosting tree this study established a retrieval model (RF) an (XGBoost) for microwave land surface emissivity by using ERA5 reanalysis data observed brightness temperature of 10.65 GHz vertical polarization from FY3C Microwave Radiation Imager-I. In addition, optimized Bayesian regularized neural network (M2_30NN) has also been basis original (M1_20NN). The results show that...
The Vertical Atmospheric Sounding Suits (VASS) onboard FY-3C satellite includes Infrared Sounder (IRAS), Microwave Temperature (MWTS) and moisture sounder (MWTHS-II). IRAS is similar to that FY-3A/B, while the MWTS-II/MWTHS-II more sophisticated than their precursors. MWTS has 13 channels mainly at window region 57 O2 absorption band, MWTHS 15 118 band 183 H2O band. A package been developed retrieve atmospheric temperature profile, total ozone, other parameters in both clear cloudy...
Data assimilation of satellite microwave sounders are very important for numerical weather prediction. Fengyun-3 (FY-3) polar satellites carry two such sounders: MicroWave Temperature Sounder (MWTS) and Humidity (MWHS). The observations should be quality-controlled before rain check is one the crucial steps. Microwave Radiation Imager (MWRI), on board FY-3 too, can provide useful information due to more sensitive precipitation than sounders. A remapping methodology described in this paper...
The second-generation Microwave Humidity Sounder (MWHS-2) onboard Fengyun (FY)-3C has a data quality comparable to that of counterpart microwave moisture sounders. However, channels 13 and 14 have large biases are negatively correlated with the instrument temperature prevent operational assimilation these two channels. To better understand 14, correlation observation minus simulation (O–B bias) different other factors is investigated for FY-3C MWHS-2 in this article. A sensitivity analysis...
Launched in 2013, and 2017 respectively, Chinese Fengyun-3C 3D meteorological satellites are equipped with two microwave sounders, Microwave Temperature Sounder (MWTS) Humidity -2 (MWHS-2), whose observations play an important role numerical weather prediction by data assimilation. Data quality control should be carried out before assimilation to filter bad data, such as cloud- or rain-polluted questionable data. This work can't accomplished purely depending on MWTS MWHS-2 themselves. is...
Improving the calibration accuracy of infrared hyperspectral interferometers is a prerequisite for their quantitative application. Updating satellite in-orbit parameters an important way to keep accuracy. However, how separate deviation one or more from coupling error observation data key issue that needs be solved. Therefore, we propose variational-based parameter optimization algorithm (VarCalPOA), which uses only and reference optimize based on variational assimilation theory obtain...
The deep-space (DS) view spectra are used as a cold reference to calibrate the Hyperspectral Infrared Atmospheric Sounder (HIRAS) Earth scene (ES) observations. DS stability in moving average window is crucial calibration accuracy of ES radiances. While winter and spring seasons, HIRAS detector-3 susceptible solar stray light intrusion when satellite flies towards tail every descending orbit, result, measured contaminated by pseudo spectra, especially short-wave infrared (SWIR) band. issue...
Infrared hyperspectral instrument is a complex optical instrument. The requirement for the application of infrared interferometer fine calibration accuracy. accuracy spectral frequency key influencing factor radiometric In order to meet quantitative application, generally within 10ppm. For instruments in geostationary orbit, focal plane has characteristics large array and small detector size. When size an orbit whether as point will affect this paper, we simulate analyze influence shape...